Replacing remote central locking?

[kaotix]

I purchased an Audi a3 1.8T Sport 1998 (R reg) but it only came with a single flat blade non-remote key. I know the alarm works but the drivers door does not unlock (key doesn't turn) so i have to unlock the car on the passenger side everytime i want to get in. 
is there any way I can either a) replace the key with a proper Audi flip remote key or b) add a universal or other remote central locking system but keep the functionality of the alarm?

any help would be greatly appreciated. 

thanks

[Jake]

had same problem on my a3. Got key fob and installed new elctrical  centeral locking, mostly effort having to remove door and panels but worth it. Have you had a look at drivers door lock?

[Bald Eagle]

My daughter had the same trouble with her Ford Ka. I fixed it with a little powdered graphite from a small squeezy bottle with the unlikely name of "Just a Puff".

I kid you not!